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The nature of inflatable packaging used in food packaging

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(1) vacuum packaging can remove oxygen, which can slowly oxidize and deteriorate food
(2) the gas suitable for filling food packaging bags should be inert and non-toxic substances with chemical properties, which can be nitrogen or carbon dioxide.
(3) quicklime has water absorption and is commonly used as food desiccant,
(4) iron powder can absorb oxygen and water from food packaging bags.
therefore, the answer is: (1) isolate oxygen and prevent food oxidation and deterioration
(2) nitrogen or carbon dioxide
(3) drying
(4) water and oxygen

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